Revoluble moldboard for plows



March 22, 1927. 1,521,772

J. N. ELLENBURG REVOLUBLE MOLD sown FOR PLOWS 4 Filed March 1925 2 Sheets-Sheet l I E J-MELLENBURG IN VEN TOR.

Mgrgh 22, 1927.

Filed March 1925 J. N. ELLEN BURG REVOLUBLE MOLD BOARD FOR PLOWS 2 Sheets-Sheet 2 JMELLENBURG IN V EN TOR.

Patented Mar. 22, 1927.

UNITEa stares rent YFFEIJCE.

.iosnrrr N. ELLENBURG, or MGKINNEY, TEXAs. AssIeNon. or ONE-HALF To JAMES J. THOMPSON, or MCKINNEY, TEXAS.

REVOLUBLE MOLIDBOARD FOB. FLOWS.

Application filed March 12, 1925.

This invention relates to improvements in plows and in such connection it relates more particularly to a mold-board therefor.

The primary object of the invention is to provide a mold-board for plows for automatically removing the soil and dirt accumulating thereon from the plow share, the moldboard being so constructed and arranged that the impact of the disturbed soil or earth mold against the mold-board will revolve the mold-board against a scraper thereon and maintain the board in a clean and unobstructed condition.

The invention may be installed on a. walking plow or on plows mounted on wheels and is simple in construction and operation.

The improved mold-board will be more fully understood by reference to the following description, in connection wit-h the accompanying drawing, and in which:

Figure 1 is a side elevational View of a plow mounted on wheels and illustrating an embodiment of the mold-board thereon,

Figure 2 is a partial perspective view of a walking plow, showing the manner of attaching the mold-board thereto.

Figure 3 is a side view of the mold-board and connecting parts, removed from the plow, Figure 4 being a vertical sectional View on line 4-4 of Figure 3, and

Figure 5 is a horizontal sectional view taken on line 55 of Figure 2.

Continuing the description of the invention and referring to its various parts more in detail, a plow frame is shown in Figure 1 mounted upon wheels 22, the frame portion 1 depending downward and providing a plow foot 2such parts being of commonly-known construction. In Figure 2 is shown a plow beam 2, plow share 3 and handles 4 of a walking plow. The disk 9 as shown in Fig. 5 is attached to one side of the plow beam or foot extension 2* by means of a block 5 and stud bolts 6-6. This block, as

will be seen in Figure 4, is conically bored to receive the spindle 7 The spindle is enlarged on one end to form an engaging curved-surface portion 8 which is bolted to the rear of the disk 9 by the bolts 8*, as best shown in Fig. 5 the mold-board 9 is cut away in part leaving a semi-circular recess to receive the disk 9 which as shown in Figs. 1,

Serial No. 15,099.

2 and 5, extends in front of the upper portion of the forward edge of the mold thence rearwardly to the rear end oi the board. The spindle 7 has on its end a. nut 10 and over the end of the spindle is a dust cap 11. An oil cup 12 is also provided for lubricating the spindle. A scraper is shown at 13. Ball bearings A are placed between thespindle portion 8 and the block 5.

The ball bearings A act in the nature of a thrust bearing, the securing or attaching portion B of the spindle being provided with a concentric recess about the spindle for embracing the adjacent rounded portion of the block, the balls being arranged in concentric and opposed raceways in the outer ends of the block and the bottom or inner end of the recess. By this arrangement an effective rotatable mounting is provided for the disk.

, In the operation of the device, the soil turned up by the plow point will be moved upwardly against the disk 9 which forms the improved mold-board. 011 the impact of the turned-up earth against the disk the latter will catch on the earth on the outside of the plow share and will rotate in the direction of the arrow and against the scraper 13. The scraper is attached to the beam by a support 14:, or in any suitable manner. In this manner the rotation of the disk against the scraper will maintain the disk in a clean and unobstructed condition, the force necessary to pull the plow through the soil being thereby greatly lessened, and the rotation of the disk being very materially aided by the thrust ball bearings and the oil spindle.

It should be understood that changes and modifications may be made in the arrangement and construction of the mold-board in' keeping within the scope and meaning of the following claim:

A plow comprising, in combination, a beam having a downturned rear end, a. plow share including a mold board secured to said end and having a. cut away part leaving a semicircular recess, a thrust block bolted to one side of said turned down end, said block having through it a spindle bearing hole and one end being shaped to form a thrust bearing, a revoluble disk to fit in said recess and attached thereto having a spindle, said spindle including an enlarged foot portion with a bottom surface curved to fit the disk hold the block to the spindle, and said disk and bolted thereto, said foot also having at extending from the front to the rear of the hollowed out portion to fit around the thrust plow share.

end of said block with a ball bearing between In testimony whereof I have signed my 5 the thrust end of theblock and the hollowed name to this specification.

out portion of the foot, said spindle passing through the hole in the block with means to JOSEPH N. ELLENBURG. 

